An often made mistake is comparing bike weights and making a big deal out of a 100 or 200 gram difference. I weigh 60kg. With my bike and all equipment including two water bottles, the total is at least 70kg or 70,000 grams. 200/70,000 is 0.29%. Its too trivial to worry about, but apparently worth charging $2000 more for the light version of the same frame. There's a sucker born every minute. Watching your body weight is just as important. Nothing funnier than a fat guy on a $15,000 bike.